Rules and Regulations of Municipal Agencies (Planning Board and Board of Adjustment). Every municipal agency, shall adopt and may amend reasonable rules and regulations, not inconsistent with the Municipal Land Use Law or this chapter, for the administration of its functions, powers and duties, including hearings, and shall furnish a copy thereof to any person upon request and may charge a reasonable fee for such copy. Copies of all such rules and regulations and amendments hereto shall be maintained in the office of the administrative officer.